HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 317
For a vector one-dimensional array, For a matrix two-dimensional array, For complex numbers
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hp40g+.book Page 3 Friday, December 9, 2005 1:03 AM 2. Highlight the matrix variable name you want to use and press . 3. Select the type of matrix to create. - For a vector (one-dimensional array), select Real vector or Complex vector. Certain operations (+, -, CROSS) do not recognize a one-dimensional matrix as a vector, so this selection is important. - For a matrix (two-dimensional array), select Real matrix or Complex matrix. 4. For each element in the matrix, type a number or an expression, and press . (The expression may not contain symbolic variable names.) For complex numbers, enter each number in complex form; that is, (a, b), where a is the real part and b is the imaginary part. You must include the parentheses and the comma. 5. Use the cursor keys to move to a different row or column. You can change the direction of the highlight bar by pressing . The menu key toggles between the following three options: - specifies that the cursor moves to the cell below the current cell when you press . - specifies that the cursor moves to the cell to the right of the current cell when you press . - specifies that the cursor stays in the current cell when you press . 6. When done, press MATRIX to see the Matrix catalog, or press to return to HOME. The matrix entries are automatically stored. Matrices A matrix is listed with two dimensions, even if it is 3×1. A vector is listed with the number of elements, such as 3. 18-3